Here we go… I have my environment up and running… So first of all we need to ask our ISP to give us IPv6 addreses.
In my case my provider – Telekom Slovenije is providing me IPv6 addresses in two different ways – depending on what kind of device I have at the locations.

So first case is where we have a L3 switch from our provider and in this case we have a /64 prefix on “wan” side of our router (connecting prefix) and /56 prefix routed over second IP address of connection prefix (which you can then split into /64 prefixes on your internal intefaces / vlans):

[admin@xxxx] /ipv6> address print
Flags: X – disabled, I – invalid, D – dynamic, G – global, L – link-local
#    ADDRESS                                   INTERFACE                                                           ADVERTISE
0  G 2a00:ee1:xxx0::2/64              ether3 – IPv6 internet uplink                              no
1  G 2a00:ee1:xxx2::100/64          lan                                                                            no

[admin@xxxx] /ipv6> route print
Flags: X – disabled, A – active, D – dynamic, C – connect, S – static, r – rip, o – ospf, b – bgp, U – unreachable
#      DST-ADDRESS              GATEWAY                  DISTANCE
0 A S  ::/0                     2a00:ee1:6700::1                1
1 ADC  2a00:ee1:xxx0::/64       ether3 – IPv6 interne…        0
2 ADC  2a00:ee1:xxx2::/64       lan                             0

Second case is where we have PPPoE session established and we receive /56 prefix by so called prefix delegation (in detail described @ GO6.si blog)

[admin@xxxx] > ipv6 dhcp-client print detail
Flags: D – dynamic, X – disabled, I – invalid
0    interface=pppoe-out1 status=bound duid=”0x00030001d4ca6d38f875″ dhcp-server-v6=fe80::230:88ff:fe04:99ec
request=prefix add-default-route=yes use-peer-dns=no pool-name=”isp-pd” pool-prefix-length=56
prefix-hint=::/0 prefix=2a00:ee2:68xx:xxxx::/56, 1h51m46s

[admin@xxxx] > ipv6 address print
Flags: X – disabled, I – invalid, D – dynamic, G – global, L – link-local
#    ADDRESS                                      INTERFACE                          ADVERTISE
0  G 2a00:ee2:68xx:xxxx::1/64       lan                                             no

When this is configured we should be able to ping some IPv6 addresses from our routers… As there is no advertising enabled everything in our network will remain calm and quiet waiting for further configuration.